On June 15, the Michigan Department of Agriculture and Rural Development confirmed strangles in two horses from Washtenaw County. The horses are from separate premises and there is no known link between the two cases at this time. One of the cases is a three-month-old Paint colt that developed nasal discharge and swollen submandibular glands. The other case is a 29-year-old American Saddlebred stallion. The status of the horses is unknown and no quarantines were placed by the Department. This brings the total number of strangles cases confirmed in Michigan in 2018 to five.

On May 3, an attending veterinarian confirmed strangles at a private facility in Shelby County, Tennessee. Four horses (an 8-year-old and 9-year old gelding, 7-year-old mare, and 2-year old Mini gelding) had clinical signs of high fevers, draining submandibular lymph nodes, coughing and nasal drainage. All four horses are alive and under voluntary quarantine until they are confirmed negative for the disease.